\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Fetal Deaths, Twinning, and Health Behaviours \label{tab:FDucond}}
\begin{tabular}{l*{7}{c}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}&\multicolumn{1}{c}{(7)}\\
                    &\multicolumn{1}{c}{Smokes}&\multicolumn{1}{c}{Drinks}&\multicolumn{1}{c}{No College}&\multicolumn{1}{c}{Anemic}&\multicolumn{1}{c}{N Cigs}&\multicolumn{1}{c}{N Drinks}&\multicolumn{1}{c}{Years Educ}\\
\midrule
Twin                &       9.907***&      10.368***&       8.991***&      11.337***&       9.939***&      10.354***&      19.630***\\
                    &     [0.123]   &     [0.119]   &     [0.145]   &     [0.117]   &     [0.121]   &     [0.119]   &     [0.552]   \\
Health (Dis)amenity &       1.394***&       4.924***&       1.683***&       0.608***&       0.108***&       0.602***&      -0.242***\\
                    &     [0.066]   &     [0.260]   &     [0.038]   &     [0.131]   &     [0.005]   &     [0.038]   &     [0.007]   \\
Twin $\times$ Health&       1.154***&       3.559** &       3.573***&       1.303** &       0.061*  &       0.756***&      -0.674***\\
                    &     [0.416]   &     [1.754]   &     [0.218]   &     [0.641]   &     [0.032]   &     [0.206]   &     [0.040]   \\
Constant            &       5.195***&       5.476***&       4.268***&       5.949***&       5.214***&       5.482***&       8.277***\\
                    &     [0.022]   &     [0.021]   &     [0.028]   &     [0.020]   &     [0.021]   &     [0.021]   &     [0.088]   \\
\midrule
Observations        &  13,660,400   &  13,809,830   &  15,909,836   &  16,158,564   &  13,679,142   &  13,828,573   &  15,909,836   \\
\bottomrule \multicolumn{8}{p{20cm}}{\begin{footnotesize}      
Each column represents a regression of fetal deaths per 1,000  
live births on twins, a health behaviour or health stock, and  
the interaction between twins and the health variable.  The    
health variable in each column is indicated in the column      
title.  Similar results conditioning on mother's age and total 
fertility are presented in table \ref{tab:FDcond}. Coefficients
from the regression are reported, and heteroscedasticity robust
standard errors are displayed in parentheses.                  
***p-value$<$0.01, **p-value$<$0.05, *p-value$<$0.01.          
\end{footnotesize}}\end{tabular}\end{table}
